A pedaling sensing device of an electric bicycle is configured to connect to a motor and includes a crank axle, a first gearwheel, a second gearwheel, an assisting unit and a sensing unit. The crank axle extends along an axial direction and has a plurality of first helical teeth connected to each other and arranged continuously. The first gearwheel is disposed around the crank axle and comprises a first inner annulus surface and a first outer annulus surface. The first inner annulus surface is formed with a plurality of second helical teeth matching the first helical teeth. The second helical teeth are connected to each other and arranged continuously. The second gearwheel is disposed around the first gearwheel and has a second inner annulus surface. The second inner annulus surface is formed with a second transmission structure matching the first transmission structure.

A securing device for securing a mid-mount motor of an electric bicycle includes a casing composed of a first part and a second part which is snugly mounted to the first part by locking members. The motor is accommodated in a room of the casing. The second part includes an end face facing the first part. A slot is formed in the second part and has a hole formed in the inner bottom of the slot. A locking member extends through a flange of the first part and the hole in the second part, and is connected to a nut located in the slot. The nut does not rotate to ensure that the first and second parts are securely connected with each other. The heat from the motor is transferred to the bike frame. Multiple deformation sensors are installed to the casing to provide precise detection data to the processor.

An electric bicycle drive unit for arrangement in a bottom bracket region of a bicycle frame, coaxially to the bottom bracket, is provided. The drive unit includes a torque sensor device for measuring a rider total torque. Rider total torque may include left-hand rider torque and a right-hand rider torque. The drive unit may include a bottom bracket shaft, an electric motor device arranged coaxially to the bottom bracket shaft, a hollow output shaft for transmitting a motor torque and the rider total torque to a bicycle drivetrain, and a rider moment coupling device for coupling the rider torque from the bottom bracket shaft to the hollow output shaft, and a motor torque coupling device for coupling the motor torque to the hollow output shaft. A torque measurement device is also provided.

An electric bicycle drive unit for arrangement in a bottom bracket region of a bicycle frame, coaxially to the bottom bracket, is provided. The drive unit includes a torque sensor device for measuring a rider total torque. Rider total torque may include left-hand rider torque and a right-hand rider torque. The drive unit may include a bottom bracket shaft, an electric motor device arranged coaxially to the bottom bracket shaft, a hollow output shaft for transmitting a motor torque and the rider total torque to a bicycle drivetrain, and a rider moment coupling device for coupling the rider torque from the bottom bracket shaft to the hollow output shaft, and a motor torque coupling device for coupling the motor torque to the hollow output shaft. A torque measurement device is also provided.

A power pedal is provided, including: a shaft, including a first end configured to be assembled to a bicycle crank, a second end and a connection section connected between the first end and the second end, the connection section including a strain sensing module; a pedal body, connected to the second end; a power sensor, including a processing module and a shell member, the processing module being disposed on an outer circumferential wall of the connection section, the processing module including a processing unit and a wireless transmission unit electrically connected to each other, the processing unit being electrically connected to the strain sensing module, the shell member being disposed on the connection section and encompassing the processing module, the shell member including a receiving room, the receiving room being configured to receive a battery which is replaceable and electrically connected to the processing unit.

A torque measurement system includes an outer rotational shaft and an inner rotational shaft both configured to rotate about a rotational axis. A rotation of the inner rotational shaft causes a rotation of the outer rotational shaft via a coupling structure. At least one torque applied to the inner rotational shaft is translated into a first torque-dependent angular shift between the shafts. A first metamaterial track is coupled to the outer rotational shaft and configured to co-rotate with the outer rotational shaft. A second metamaterial track is coupled to the inner rotational shaft and configured to co-rotate with the inner rotational shaft. The tracks are configured to convert an electro-magnetic transmit signal into a first electro-magnetic receive signal based on the first torque-dependent angular shift and a receiver is configured to receive the electro-magnetic receive signal and measure the at least one torque based on the electro-magnetic receive signal.

A bicycle crankarm provided with an electric/electronic system, including a battery power unit, a processor having a standby mode and a running mode, and a wake unit that emits a wake signal of the processor, wherein the wake unit is completely supported by or in the crankarm.

A human-powered vehicle control device for a human-powered vehicle includes an electronic controller configured to control a motor, which applies a propulsion force to a human-powered vehicle, in correspondence with a human driving force input to the human-powered vehicle. The electronic controller is configured to control the motor so as to increase an assist force produced by the motor for when an output of the motor is maximal upon determining a parameter related to at least one of a vehicle speed of the human-powered vehicle, an inclination angle of the human-powered vehicle, and a travel resistance of the human-powered vehicle has increased.

A pedal for bicycles comprising a pedal-pin, which extends along a reference axis, and a pedal-body, which is coupled to the pedal-pin in a rotary free manner. An internal chamber is obtained in the pedal-pin and has an internal surface, which extends along the reference axis approximately coaxial to the latter. The pedal further comprises strain gauges, which are configured to detect electrical parameters indicative of the mechanical deformation of the pedal-pin, and an electronic circuit, which is configured to determine, based on the electrical parameters, the mechanical deformation of the pedal-pin. The strain gauges are rigidly fixed on the internal surface of the internal chamber by means of a thin fixing layer of adhesive material.

Provided is an electric power assist device for bicycles, which can achieve proper power assist control in response to the pedaling force without any complicated feature for detecting pedaling forces and any necessity of modification to a bicycle. The device comprises: a pedaling force estimator 154 configured to estimate a pedaling force put on each pedal of a bicycle based on a variation between average current levels I flowing in an electric motor 58 measured within a first crank rotational angle range A and a second crank rotational angle range B which is different from the first crank rotational angle range; and a crank rotational angle adjuster 152 configured to adjust the first crank rotational angle range A and the second crank rotational angle range B according to the gradient of a road on which the bicycle is traveling.